What are the differences between pneumatic valves and electric valves, and what are their advantages and disadvantages? This article will introduce them to you.

什么是氣動(dòng)閥門

What is a pneumatic valve

氣動(dòng)閥門就是借助壓縮空氣驅(qū)動(dòng)的閥門。氣動(dòng)閥采購時(shí)只明確規(guī)格、類別、工壓就滿足采購要求的作法，可用于控制空氣、水、蒸汽、各種腐蝕性介質(zhì)、泥漿、油品、液態(tài)金屬和放射性介質(zhì)等各種類型流體的流動(dòng)。在當(dāng)前市場(chǎng)經(jīng)濟(jì)環(huán)境里是不完善的。因?yàn)闅鈩?dòng)閥制造廠家為了產(chǎn)品的競(jìng)爭(zhēng)，各自均在氣動(dòng)閥統(tǒng)一設(shè)計(jì)的構(gòu)思下，進(jìn)行不同的創(chuàng)新，形成了各自的企業(yè)標(biāo)準(zhǔn)及產(chǎn)品個(gè)性。因此在氣動(dòng)閥采購時(shí)較詳盡的提出技術(shù)要求，與廠家協(xié)調(diào)取得共識(shí)，作為氣動(dòng)閥采購合同的附件是十分必要的。本類閥門在管道中一般應(yīng)當(dāng)水平安裝。

Pneumatic valve is a valve driven by compressed air. The pneumatic valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It is imperfect in the current market economic environment. For the sake of product competition, pneumatic valve manufacturers have made different innovations under the idea of unified design of pneumatic valves, forming their own enterprise standards and product personality. Therefore, it is necessary to put forward technical requirements in detail when purchasing pneumatic valves and reach a consensus through coordination with the manufacturer as an annex to the pneumatic valve purchase contract. Generally, this type of valve shall be installed horizontally in the pipeline.

氣動(dòng)閥門是具有氣動(dòng)執(zhí)行機(jī)構(gòu)雙層氣缸 ，并帶有緩沖機(jī)構(gòu)和手動(dòng)及其保護(hù)機(jī)構(gòu)，該閥由于采用雙層氣缸結(jié)構(gòu)，其與單氣缸式氣動(dòng)閘閥相比，提升力大了一倍。這就從根本上解決了單氣缸氣動(dòng)閘閥的某些閥體內(nèi)楔死而打不開的弊病。

The pneumatic valve has a double-layer cylinder with a pneumatic actuator, a buffer mechanism, a manual and its protection mechanism. Due to the double-layer cylinder structure, the lifting force of the valve is twice as large as that of the single cylinder pneumatic gate valve. This fundamentally solves the problem that some valve bodies of single cylinder pneumatic gate valves are wedged and cannot be opened.

什么是電動(dòng)閥門

What is an electric valve

電動(dòng)閥門動(dòng)作力距比普通閥門大，電動(dòng)閥門開關(guān)動(dòng)作速度可以調(diào)整，結(jié)構(gòu)簡(jiǎn)單，易維護(hù)，可用于控制空氣、水、蒸汽、各種腐蝕性介質(zhì)、泥漿、油品、液態(tài)金屬和放射性介質(zhì)等各種類型流體的流動(dòng)。而傳統(tǒng)的氣動(dòng)閥門動(dòng)作過程中因氣體本身的緩沖特性，不易因卡住而損壞，但有氣源，且其控制系統(tǒng)也比電動(dòng)閥門復(fù)雜。 本類閥門在管道中一般應(yīng)當(dāng)水平安裝。

The actuating force distance of the electric valve is larger than that of the ordinary valve. The switching speed of the electric valve can be adjusted. The electric valve has simple structure and is easy to maintain. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metal and radioactive media. However, the traditional pneumatic valve is not easy to be damaged due to the buffer characteristics of the gas itself, but it has a gas source, and its control system is more complex than the electric valve. Generally, this type of valve shall be installed horizontally in the pipeline.

電動(dòng)閥門是一種做直線運(yùn)動(dòng)的閥門，它與Z型多回轉(zhuǎn)執(zhí)行機(jī)構(gòu)相配，有開關(guān)型和智能型。此閥門操作簡(jiǎn)單是一種較常見的啟閉閥，它利用閘板的上、下工作來接通和關(guān)斷管道中的流體介質(zhì)。廣泛用于電力、冶金、石油、化工、造紙、污水處理等部門。

Electric valve is a kind of valve with linear motion, which is matched with Z-type multi rotation actuator, including switch type and intelligent type. This valve is easy to operate. It is a common open and close valve. It uses the up and down work of the ram to connect and shut off the fluid medium in the pipeline. It is widely used in electric power, metallurgy, petroleum, chemical industry, papermaking, sewage treatment and other departments.

電動(dòng)閥門和氣動(dòng)閥門的區(qū)別：

Difference between electric valve and pneumatic valve:

1、氣動(dòng)閥動(dòng)作力距比電動(dòng)閥門大，氣動(dòng)閥門開關(guān)動(dòng)作速度可以調(diào)整，結(jié)構(gòu)簡(jiǎn)單，易維護(hù)，動(dòng)作過程中因氣體本身的緩沖特性，不易因卡住而損壞，但有氣源，且其 控制系統(tǒng)也比電動(dòng)閥門復(fù)雜。氣動(dòng)閥門響應(yīng)靈敏，很多對(duì)控制要求高的廠專為氣動(dòng)儀表控制元件設(shè)置壓縮空氣站。氣動(dòng)閥門執(zhí)行機(jī)構(gòu)動(dòng)力源為氣源，氣源 來源于空壓機(jī)，采用定位器將電控信號(hào)轉(zhuǎn)換成氣動(dòng)控制信號(hào)，驅(qū)動(dòng)氣動(dòng)執(zhí)行機(jī)構(gòu)進(jìn)行閥位調(diào)節(jié)。

1. The actuating force distance of the pneumatic valve is larger than that of the electric valve. The switching speed of the pneumatic valve can be adjusted. The structure is simple and easy to maintain. Due to the buffer characteristics of the gas itself, it is not easy to get stuck and damaged during the action. However, there is a gas source, and its control system is more complex than that of the electric valve. Pneumatic valves are sensitive. Many factories with high control requirements set compressed air stations for pneumatic instrument control elements. The power source of the pneumatic valve actuator is the air source. The air source is from the air compressor. The positioner is used to convert the electric control signal into the pneumatic control signal to drive the pneumatic actuator for valve position adjustment.

2、電動(dòng)閥門執(zhí)行機(jī)構(gòu)動(dòng)力源為電源，如果線路板或電機(jī)出現(xiàn)故障容易出現(xiàn)火花，所以一般應(yīng)用在環(huán)境要求不高和沒有危險(xiǎn)的場(chǎng)合就氣動(dòng)執(zhí)行機(jī)構(gòu)和電動(dòng)執(zhí)行機(jī)構(gòu)調(diào) 節(jié)性能比較，氣動(dòng)執(zhí)行機(jī)構(gòu)響應(yīng)速度更快，能更適合應(yīng)用在調(diào)節(jié)工況，所以生產(chǎn)調(diào)節(jié)閥的廠家都同時(shí)生產(chǎn)氣動(dòng)執(zhí)行機(jī)構(gòu)與之配套。

2. The power source of the electric valve actuator is the power supply. If the circuit board or motor fails, sparks are likely to occur. Therefore, it is generally used in occasions with low environmental requirements and no danger. Compared with the regulating performance of the pneumatic actuator and the electric actuator, the pneumatic actuator has faster response speed and can be more suitable for application in the regulating condition. Therefore, the manufacturers of the regulating valve produce the pneumatic actuator at the same time.

3、電動(dòng)執(zhí)行機(jī)構(gòu)的調(diào)節(jié)響應(yīng)速度不夠快，調(diào)節(jié)閥上配氣動(dòng)執(zhí)行機(jī)構(gòu)要比電動(dòng)執(zhí)行機(jī)構(gòu)應(yīng)用多。4、電動(dòng)閥門和氣動(dòng)閥門的本質(zhì)區(qū)別在于使用不同的驅(qū)動(dòng)裝置，也就是執(zhí)行機(jī)構(gòu)，而調(diào)節(jié)閥本身沒有什么區(qū)別。配合不同的執(zhí)行機(jī)構(gòu)主要是工況要求，如化工等要求 防爆的場(chǎng)合，使用較多的是氣動(dòng)閥門，因?yàn)樾砸蟾?，而且價(jià)格便宜，配合智能定位器可以上總線，控制方式也簡(jiǎn)單。

3. The adjustment response speed of the electric actuator is not fast enough, and the pneumatic actuator on the control valve is more applied than the electric actuator. 4. The essential difference between electric valve and pneumatic valve lies in the use of different driving devices, that is, actuators, while there is no difference between the regulating valve itself. Matching with different actuators is mainly based on the requirements of working conditions, such as chemical industry and other occasions requiring explosion-proof. Pneumatic valves are mostly used because of their high requirements and low price. They can be connected to the bus with intelligent positioners, and the control mode is also simple.

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